1959

7.8

2000

7.3

2017

6.4

1982

7.0

1951

7.7

1988

7.5

1983

6.3

1995

6.4

1997

7.4

1971

8.2

1983

7.2

1986

7.9

1972

8.7

1974

8.6

2005

6.7

2001

6.3

1991

7.0

1995

6.5

2022

6.2

1981

7.2